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Subject: Re: [xacml] urn:oasis:names:tc:xacml:1.0:function:present

is the scope of this the entire RC or a specific rule (from which it is evoked)? 
  seems that something important enough to be declared must-be-present should 
have some sort of context constraint...?


Tim Moses wrote:

> Colleagues - If we are to retain the function "present", how about this as a
> definition?
> urn:oasis:names:tc:xacml:1.0:function:present
> This function SHALL take one argument of data-type
> "http://www.w3.org/2001/XMLSchema#anyURI"; and SHALL return a
> "http://www.w3.org/2001/XMLSchema#boolean";.  The return value SHALL be
> "True" if there exists anywhere in the request context an attribute with an
> attributeId attribute whose value is the same as that of the function
> argument, according to the
> urn:oasis:names:tc:xacml:1.0:function:anyURI-equal function.  Otherwise, it
> SHALL return "False".
> What do you think?
> All the best.  Tim.

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